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Design News, May 2013

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the PCB to the microprocessor, which can save additional space and make the design validation process easier. Placing one sensor instead of two on the board also cuts down on the bill of materials, and can reduce the chance of assembly and manufacturing mistakes. It also requires fewer connections, and all those connections are potential failure points, as well. life. Another key characteristic includes wake-up/sleep modes to help extend battery life. This helps reduce the size of the power supply, and thus the weight of the medical device. Designers also may want to consider sensors with liquid media compatibility. As an example, pressure sensors are often exposed to some kind of liquid media, such as blood, water, or chemicals, in pressure sensing medical applications. If the sensor is not compatible with the liquid media, the designer will need to ensure that the sensor is protected so it does not fail. This often results in additional components to protect the sensor, which requires more real estate. Component flexibility allows medical device engineers to select the right sensor for their designs. By providing a wide selection of options for port styles, mounting types, packaging, voltage ranges, digital/analog outputs, and liquid media compatibility in a product family platform, sensor manufacturers also help designers quickly meet their application requirements without a costly custom device. It also enables them to quickly make any changes to the equipment design and specifications without adding cost or delaying product launches. AJ Smith is director of product marketing at Honeywell Sensing and Control. For more information go to: http://sensing.honeywell.com/. Device Intelligence Sensors help support the reduction of product size by incorporating more device intelligence inside the sensor module itself. This translates into sensors that are fully calibrated, temperature compensated, amplified, and offer high-resolution digital outputs. These features facilitate a reduction of electrical components on the PCB, reducing size, weight, and cost. Digital interfaces can also impact product miniaturization. A digital interface provides a direct signal path from the sensor to the microprocessor, eliminating the need for other components such as resistors, capacitors, and amplifiers, which would require additional PCB space. In addition to smaller packaging, integration, and device intelligence, medical device designers looking to shrink their products also need to consider several other features such as low voltage and low power requirements for longer battery NEW MOTT STERILIZING GRADE MEMBRANE Better protection against bacteria. Mott all-metal, sterilizing-grade filter media is the proven and effective way to block bacteria in medical and life science applications. Available in titanium or stainless steel, the media is biocompatible, impervious to solvents, and compatible with most organic compounds and complex drug chemistries. Custom configurations, shapes and sizes Metallurgically pure, biocompatible, autoclavable Meets ASTM F838-05 for bacterial retention Patent pending Visit mottcorp.com for more information. mott corporation [w ww. d e s i g n n e w s . c om] magenta cyan yellow black 84 Spring Lane,EFarmington, CTME DICAL / A S|UP860-747-6333 DE S IG N NEWS T5 MAY 2013 T R ND WAT CH : 06032-3159 P LE ME NT TO Fax 860-747-6739 www.mottcorp.com | email: quest@mottcorp.com ES245515_DNTW1305_T5.pgs 05.03.2013 00:10 UBM

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